Now showing items 21-40 of 203

• Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
A search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass mℓℓ<30 GeV is presented. The analysis is performed using 139 fb−1 of proton–proton collision data, produced by the ...
• Evidence for the production of three massive vector bosons with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
• Evidence for tt¯ tt¯ production in the multilepton final state in proton–proton collisions at √s=13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-11-24)
A search is presented for four-top-quark production using an integrated luminosity of 139 fb−1 of proton–proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are ...
• Exclusive dimuon production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with ATLAS ﻿

(Journal article; Peer reviewed, 2021)
Exclusive dimuon production in ultraperipheral collisions (UPC), resulting from photon-photon interactions in the strong electromagnetic fields of colliding high-energy lead nuclei, PbPb(γ γ ) → μ+μ−(Pb() Pb() ), is studied ...
• Fluctuations of anisotropic flow in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-01-09)
Multi-particle azimuthal cumulants are measured as a function of centrality and transverse momentum using 470 μb−1 of Pb+Pb collisions at sNN−−−√ = 5.02 TeV with the ATLAS detector at the LHC. These cumulants provide ...
• Higgs boson production cross-section measurements and their EFT interpretation in the 4 ℓ decay channel at √s= 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-10)
Higgs boson properties are studied in the four-lepton decay channel (where lepton = e, μ) using 139 fb−1 of proton–proton collision data recorded at s√=13 TeV by the ATLAS experiment at the Large Hadron Collider. The ...
• Identification of boosted Higgs bosons decaying into b-quark pairs with the ATLAS detector at 13 TeV ﻿

(Peer reviewed; Journal article, 2019)
This paper describes a study of techniques for identifying Higgs bosons at high transverse momenta decaying into bottom-quark pairs, H→bb¯, for proton–proton collision data collected by the ATLAS detector at the Large ...
• In situ calibration of large-radius jet energy and mass in 13 TeV proton–proton collisions with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-02-13)
The response of the ATLAS detector to largeradius jets is measured in situ using 36.2 fb−1 of √s = 13 TeV proton–proton collisions provided by the LHC and recorded by the ATLAS experiment during 2015 and 2016. The jet ...
• Jet energy scale and resolution measured in proton–proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
Jet energy scale and resolution measurements with their associated uncertainties are reported for jets using 36–81 fb$^{-1}$ of proton–proton collision data with a centre-of-mass energy of $\sqrt{s}=13$ \({\text ...
• Longitudinal Flow Decorrelations in Xe+Xe Collisions at √sNN =5.44 TeV with the ATLAS Detector ﻿

(Journal article; Peer reviewed, 2021)
The first measurement of longitudinal decorrelations of harmonic flow amplitudes vn for n=2–4 in Xe+Xe collisions at √sNN=5.44 TeV is obtained using 3 μb−1 of data with the ATLAS detector at the LHC. The decorrelation ...
• Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon ...
• Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-08-10)
Azimuthal anisotropies of muons from charm and bottom hadron decays are measured in Pb+Pb collisions at √sNN = 5.02 TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2018 with ...
• Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in pp collisions at √s=13  TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020)
The elliptic flow of muons from the decay of charm and bottom hadrons is measured in pp collisions at √s=13  TeV using a data sample with an integrated luminosity of 150  pb−1 recorded by the ATLAS detector at the LHC. The ...
• Measurement of b-quark fragmentation properties in jets using the decay B± → J/ψK± in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
The fragmentation properties of jets containing b-hadrons are studied using charged B mesons in 139 fb−1 of pp collisions at √s = 13 TeV, recorded with the ATLAS detector at the LHC during the period from 2015 to 2018. The ...
• Measurement of differential cross sections for single diffractive dissociation in √s = 8 TeV pp collisions using the ATLAS ALFA spectrometer ﻿

(Journal article; Peer reviewed, 2020-02-06)
A dedicated sample of Large Hadron Collider proton-proton collision data at centre-of-mass energy s√ = 8 TeV is used to study inclusive single diffractive dissociation, pp → X p. The intact final-state proton is reconstructed ...
• Measurement of distributions sensitive to the underlying event in inclusive Z boson production in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-08-08)
This paper presents measurements of charged-particle distributions sensitive to the properties of the underlying event in events containing a Z boson decaying into a muon pair. The data were obtained using the ATLAS detector ...
• Measurement of fiducial and differential W+W−production cross-sections at √s=13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-10-29)
A measurement of fiducial and differential cross-sections for W+W− production in proton–proton collisions at s√=13 TeV with the ATLAS experiment at the Large Hadron Collider using data corresponding to an integrated ...
• Measurement of flow harmonics correlations with mean transverse momentum in lead–lead and proton–lead collisions at √sNN−−−=5.02 TeVwith the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-12-03)
To assess the properties of the quark–gluon plasma formed in ultrarelativistic ion collisions, the ATLAS experiment at the LHC measures a correlation between the mean transverse momentum and the flow harmonics. The analysis ...
• Measurement of hadronic event shapes in high-pT multijet final states at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at √s = 13 TeV with the ATLAS detector at the Large Hadron Collider. Six event-shape variables ...
• Measurement of isolated-photon plus two-jet production in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-03-30)
The dynamics of isolated-photon plus two-jet production in pp collisions at a centre-of-mass energy of 13 TeV are studied with the ATLAS detector at the LHC using a dataset corresponding to an integrated luminosity of 36.1 ...